A method for prioritising advertisements for a location 110 comprises identifying people 101B-104B in a group of people at the location, determining a score for each person identified indicating their likelihood to promote or detract from a product to be advertised and prioritising adverts based on the aggregate scores of the people identified. The method may also include the step of identifying a target person 104B at the location to which the advertisement is to be directed and modifying the aggregate score by excluding or weighting the score related to the target person. The method is intended to avoid displaying an advert for a product to the target person when other people in the group might disparage that product and thereby negatively influence the target person and to instead display adverts to a target which the other people would recommend. The location may be a real location, e.g. electronic billboard, or a virtual location, e.g. internet chatroom.
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